Camera optical lens including eight lenses of +−+−+−+− or +−+−−−+− refractive powers

ABSTRACT

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; and an eighth lens. The camera optical lens satisfies following conditions: 1.90≤f 1 /f≤3.00; f 2 ≤0.00; and 1.55≤n 3 ≤1.70, where f denotes a focal length of the camera optical lens; f 1  denotes a focal length of the first lens; f 2  denotes a focal length of the second lens; and n 3  denotes a refractive index of the third lens. The present disclosure can achieve high optical performance while achieving ultra-thin, wide-angle lenses having a big aperture.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and moreparticularly, to a camera optical lens suitable for handheld terminaldevices such as smart phones or digital cameras and camera devices suchas monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lenses with good imaging quality therefore have become amainstream in the market.

In order to obtain better imaging quality, the lens that istraditionally equipped in mobile phone cameras adopts a three-piece orfour-piece lens structure, or even a five-piece or six-piece structure.Also, with the development of technology and the increase of the diversedemands of users, and as the pixel area of photosensitive devices isbecoming smaller and smaller and the requirement of the system on theimaging quality is improving constantly, an eight-piece lens structuregradually appears in lens designs. Although the common eight-piece lenshas good optical performance, its settings on refractive power, lensspacing and lens shape still have some irrationality, which results inthat the lens structure cannot achieve a high optical performance whilesatisfying design requirements for ultra-thin, wide-angle lenses havinga big aperture.

SUMMARY

In view of the problems, the present disclosure aims to provide a cameralens, which can achieve a high optical performance while satisfyingdesign requirements for ultra-thin, wide-angle lenses having a bigaperture.

In an embodiment, the present disclosure provides a camera optical lens.The camera optical lens includes, from an object side to an image side:a first lens; a second lens; a third lens; a fourth lens; a fifth lens;a sixth lens; a seventh lens; and an eighth lens. The camera opticallens satisfies following conditions: 1.90≤f1/f≤3.00; f2≤0.00; and1.55≤n3≤1.70, where f denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens; f2 denotes a focal lengthof the second lens; and n3 denotes a refractive index of the third lens.

The present disclosure can achieve ultra-thin, wide-angle lenses havinggood optical characteristics and a big aperture, which are especiallysuitable for camera lens assembly of mobile phones and WEB camera lensesformed by CCD, CMOS and other imaging elements for high pixels.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 2 of the present disclosure;

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 3 of the present disclosure;

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail withreference to several exemplary embodiments. To make the technicalproblems to be solved, technical solutions and beneficial effects of thepresent disclosure more apparent, the present disclosure is described infurther detail together with the figure and the embodiments. It shouldbe understood the specific embodiments described hereby is only toexplain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera opticallens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment1 of the present disclosure. The camera optical lens 10 includes 8lenses. Specifically, the camera optical lens 10 includes, from anobject side to an image side, an aperture S, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixthlens L6, a seventh lens L7, and an eighth lens L8. An optical elementsuch as a glass filter (GF) can be arranged between the eighth lens L8and an image plane Si.

Here, a focal length of the camera optical lens 10 is defined as f, anda focal length of the first lens L1 is defined as f1. The camera opticallens 10 should satisfy a condition of 1.90≤f1/f≤3.00, which specifics aratio between the focal length of the first lens and the focal length ofthe camera optical lens. When the condition is satisfied, a sphericalaberration and the field curvature of the system can be effectivelybalanced.

A focal length of the second lens L2 is defined as f2, which satisfies acondition of f2≤0.00. This condition specifies a negative value for thefocal length of the second lens. This leads to the more appropriatedistribution of the focal length, thereby achieving a better imagingquality and a lower sensitivity.

A refractive index of the third lens L3 is defined as n3, whichsatisfies a condition of 1.55≤n3≤3.70. This condition specifies therefractive index of the third lens L3. This facilitates improving theoptical performance of the system.

A curvature radius of an object side surface of the seventh lens L7 isdefined as R13, and a curvature radius of an image side surface of theseventh lens L7 is defined as R14. The camera optical lens 10 shouldsatisfy a condition of −7.00≤(R13+R14)/(R13−R14)≤−2.00, which specifiesa shape of the seventh lens L7. This condition can alleviate thedeflection of light passing through the lens while effectively reducingaberrations.

An on-axis thickness of the third lens L3 is defined as d5, and anon-axis distance from an image side surface of the third lens L3 to anobject side surface of the fourth lens L4 is defined as d6. The cameraoptical lens 10 should satisfy a condition of 5.00≤d5/d6≤22.00. Thiscondition specifies a ratio of the thickness of the third lens L3 andthe on-axis distance from the image side surface of the third lens L3 tothe object side surface of the fourth lens L4. This facilitates reducinga total length of the optical system while achieving the ultra-thineffect. As an example, 5.16≤d5/d6≤21.88.

A curvature radius of an object side surface of the first lens L1 isdefined as R1, and a curvature radius of an image side surface of thefirst lens L1 is defined as R2. The camera optical lens 10 shouldsatisfy a condition of −15.47≤(R1+R2)/(R1−R2)≤−2.06. This condition canreasonably control a shape of the first lens in such a manner that thefirst lens can effectively correct spherical aberrations of the system.As an example, −9.67≤(R1+R2)/(R1−R2)≤−2.57.

An on-axis thickness of the first lens L1 is defined as d1, and a totaloptical length from the object side surface of the first lens L1 to animage plane of the camera optical lens along an optic axis is defined asTTL. The camera optical lens 10 should satisfy a condition of0.03≤d1/TTL≤0.11. This condition can facilitate achieving ultra-thinlenses. As an example, 0.04≤d1/TTL≤0.09.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the second lens L2 is defined as f2. The camera opticallens 10 should satisfy a condition of −25.25≤f2/f≤−1.32. This conditioncan facilitate correction aberrations of the optical system bycontrolling a negative refractive power of the second lens L2 within areasonable range. As an example, −15.78≤f2/f≤−1.65.

A curvature radius of an object side surface of the second lens L2 isdefined as R3, and a curvature radius of an image side surface of thesecond lens L2 is defined as R4. The camera optical lens 10 shouldsatisfy a condition of 1.37≤(R3+R4)/(R3−R4)≤23.22, which specifies ashape of the second lens L2. This can facilitate correction of anoff-axis aberration with development towards ultra-thin lenses. As anexample, 2.20≤(R3+R4)/(R3−R4)≤18.58.

An on-axis thickness of the second lens L2 is defined as d3. The cameraoptical lens 10 should satisfy a condition of 0.02≤d3/TTL≤0.05. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.02≤d3/TTL≤0.04.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the third lens L3 is defined as f3. The camera opticallens 10 should satisfy a condition of 0.33≤f3/f≤1.41. This condition canlead to the more appropriate distribution of the refractive power,thereby achieving a better imaging quality and a lower sensitivity. Asan example, 0.52≤f3/f≤1.13.

A curvature radius of an object side surface of the third lens L3 isdefined as R5, and a curvature radius of an image side surface of thethird lens L3 is defined as R6. The camera optical lens 10 shouldsatisfy a condition of −0.53≤(R5+R6)/(R5−R6)≤−0.05, which specifies ashape of the third lens. This condition can alleviate the deflection oflight passing through the lens while effectively reducing aberrations.As an example, −0.33≤(R5+R6)/(R5−R6)≤−0.06.

An on-axis thickness of the third lens L3 is defined as d5. The cameraoptical lens 10 should satisfy a condition of 0.03≤d5/TTL≤0.13. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.06≤d5/TTL≤0.10.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the fourth lens L4 is defined as f4. The camera opticallens 10 should satisfy a condition of −3.81≤f4/f≤−0.49, which specifiesa ratio of the focal length of the fourth lens and the focal length ofthe camera optical lens. This condition can facilitate improving theoptical performance of the system. As an example, −2.38≤f4/f≤−0.61.

A curvature radius of an object side surface of the fourth lens L4 isdefined as R7, and a curvature radius of an image side surface of thefourth lens L4 is defined as R8. The camera optical lens 10 shouldsatisfy a condition of 0.32≤(R7+R8)/(R7−R8)≤3.53, which specifies ashape of the fourth lens L4. This can facilitate correction of anoff-axis aberration with development towards ultra-thin lenses. As anexample, 0.51≤(R7+R8)/(R7−R8)≤2.83.

An on-axis thickness of the fourth lens L4 is defined as d7. The cameraoptical lens 10 should satisfy a condition of 0.02≤d7/TTL≤0.07. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.03≤d7/TTL≤0.06.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the fifth lens L5 is defined as f5. The camera opticallens 10 should satisfy a condition of −45.83≤f5/f≤157.32. This conditioncan effectively make a light angle of the camera lens gentle and reducethe tolerance sensitivity. As an example, −28.65≤f5/f≤125.85.

A curvature radius of an object side surface of the fifth lens L5 isdefined as R9, and a curvature radius of an image side surface of thefifth lens L5 is defined as R10. The camera optical lens 10 shouldsatisfy a condition of −140.64≤(R9+R10)/(R9−R10)≤13.50, which specifiesa shape of the fifth lens L5. This can facilitate correction of anoff-axis aberration with development towards ultra-thin lenses. As anexample, −87.90≤(R9+R10)/(R9−R10)≤10.80.

An on-axis thickness of the fifth lens L5 is defined as d9. The cameraoptical lens 10 should satisfy a condition of 0.02≤d9/TTL≤0.13. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.03≤d9/TTL≤0.10.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the sixth lens L6 is defined as f6. The camera opticallens 10 should satisfy a condition of −21.08≤f6/f0≤−1.00. This conditioncan lead to the more appropriate distribution of the refractive power,thereby achieving a better imaging quality and a lower sensitivity. Asan example, −13.17≤f6/f≤−1.25.

A curvature radius of an object side surface of the sixth lens L6 isdefined as R11, and a curvature radius of an image side surface of thesixth lens L6 is defined as R12. The camera optical lens 10 shouldsatisfy a condition of 1.04≤(R11+R12)/(R11−R12)≤11.70, which specifies ashape of the sixth lens L6. This can facilitate correction of anoff-axis aberration with development towards ultra-thin lenses. As anexample, 1.66≤(R11+R12)/(R11−R12)≤9.36.

An on-axis thickness of the sixth lens L6 is defined as d1. The cameraoptical lens 10 should satisfy a condition of 0.03≤d11/TTL≤0.10. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.05≤d11/TTL≤0.08.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the seventh lens L7 is defined as f7. The camera opticallens 10 should satisfy a condition of 0.38≤f7/f≤2.48. This condition canlead to the more appropriate distribution of the refractive power,thereby achieving a better imaging quality and a lower sensitivity. Asan example, 0.61≤f7/f≤1.98.

An on-axis thickness of the seventh lens L7 is defined as d13. Thecamera optical lens 10 should satisfy a condition of 0.03≤d13/TTL≤0.12.This condition can facilitate achieving ultra-thin lenses. As anexample, 0.05≤d13/TTL≤0.10.

The focal length of the camera optical lens 10 is defined as f, and thefocal length of the eighth lens L8 is defined as f8. The camera opticallens 10 should satisfy a condition of −1.80≤f8/f≤−0.53. This conditioncan lead to the more appropriate distribution of the refractive power,thereby achieving a better imaging quality and a lower sensitivity. Asan example, −1.13≤f8/f≤−0.67.

A curvature radius of an object side surface of the eighth lens L8 isdefined as R15, and a curvature radius of an image side surface of theeighth lens L8 is defined as R16. The camera optical lens 10 shouldsatisfy a condition of −1.18≤(R15+R16)/(R15−R16)≤0.87, which specifies ashape of the eighth lens L8. This can facilitate correction of anoff-axis aberration with development towards ultra-thin lenses. As anexample, −0.74≤(R15+R16)/(R15−R16)≤0.70.

An on-axis thickness of the eighth lens L8 is defined as d15. The cameraoptical lens 10 should satisfy a condition of 0.02≤d15/TTL≤0.09. Thiscondition can facilitate achieving ultra-thin lenses. As an example,0.03≤d15/TTL≤0.07.

In this embodiment, an image height of the camera optical lens 10 isdefined as IH. The camera optical lens 10 should satisfy a condition ofTTL/IH≤1.48. This condition can facilitate achieving ultra-thin lenses.

In this embodiment, an F number of the camera optical lens 10 is smallerthan or equal to 1.96, thereby leading to a big aperture and highimaging performance.

In this embodiment, a FOV (field of view) of the camera optical lens 10is greater than or equal to 78°, thereby achieving the wide-angleperformance.

When the focal length of the camera optical lens 10, the focal lengthsof respective lenses, the refractive index of the seventh lens, theon-axis thicknesses of respective lenses, the TTL, and the curvatureradius of object side surfaces and image side surfaces of respectivelenses satisfy the above conditions, the camera optical lens 10 willhave high optical performance while achieving ultra-thin, wide-anglelenses having a big aperture. The camera optical lens 10 is especiallysuitable for camera lens assembly of mobile phones and WEB camera lensesformed by CCD, CMOS and other imaging elements for high pixels.

In the following, examples will be used to describe the camera opticallens 10 of the present disclosure. The symbols recorded in each examplewill be described as follows. The focal length, on-axis distance,curvature radius, on-axis thickness, inflexion point position, andarrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object sidesurface of the first lens L1 to the image plane of the camera opticallens along the optic axis) in mm.

In an example, inflexion points and/or arrest points can be arranged onthe object side surface and/or image side surface of the lens, so as tosatisfy the demand for the high quality imaging. The description belowcan be referred to for specific implementations.

Table 1 and Table 2 show design data of the camera optical lens 10according to Embodiment 1 of the present disclosure.

TABLE 1 R d nd νd S1 ∞ d0 = −0.449 R1 4.004 d1 = 0.667 nd1 1.5450 ν155.81 R2 7.844 d2 = 0.149 R3 11.203 d3 = 0.289 nd2 1.6701 ν2 19.39 R45.220 d4 = 0.030 R5 5.106 d5 = 0.637 nd3 1.6701 ν3 19.39 R6 −8.741 d6 =0.032 R7 −20.454 d7 = 0.390 nd4 1.6701 ν4 19.39 R8 4.489 d8 = 0.320 R99.765 d9 = 0.769 nd5 1.5450 ν5 55.81 R10 −12.979 d10 = 1.440 R11 18.436d11 = 0.519 nd6 1.6359 ν6 23.82 R12 8.815 d12 = 0.259 R13 2.178 d13 =0.533 nd7 1.5510 ν7 45.00 R14 2.929 d14 = 1.919 R15 −17.601 d15 = 0.360nd8 1.5450 ν8 55.81 R16 4.639 d16 = 0.375 R17 ∞ d17 = 0.210 ndg 1.5168νg 64.17 R18 ∞ d18 = 0.246

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radiusfor a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of the object side surface of the seventh lens L7;

R14: curvature radius of the image side surface of the seventh lens L7;

R15: curvature radius of the object side surface of the eighth lens L8;

R16: curvature radius of the image side surface of the eighth lens L8;

R17: curvature radius of an object side surface of the optical filterGF;

R18: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 tothe object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 tothe object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6to the object side surface of the seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image side surface of the seventh lens L7to the object side surface of the eighth lens L8;

d15: on-axis thickness of the eighth lens L8;

d16: on-axis distance from the image side surface of the eighth lens L8to the object side surface of the optical filter GF;

d17: on-axis thickness of the optical filter GF;

d18: on-axis distance from the image side surface of the optical filterGF to the image plane;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

nd7: refractive index of d line of the seventh lens L7;

nd8: refractive index of d line of the eighth lens L8;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

v8: abbe number of the eighth lens L8;

vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface data of respective lens in the cameraoptical lens 10 according to Embodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 A18 A20 R1 −4.9686E−01 −2.5446E−03 −1.8484E−03   3.2024E−03−2.9385E−03   1.7312E−03 −6.4761E−04   1.5173E−04 −2.0254E−05  1.1854E−06 R2 −3.8994E+00 −1.9798E−02   4.1619E−03 −9.6689E−05  1.9375E−04 −5.4504E−04   4.2872E−04 −1.5476E−04   2.6958E−05−1.8113E−06 R3   1.5927E+01 −1.6301E−02   3.7805E−03 −1.2384E−03−1.4056E−03   1.5117E−03 −6.0350E−04   1.1276E−04 −7.9907E−06−4.9431E−08 R4 −1.5890E+01   8.9999E−03   1.5556E−02 −2.3569E−02  1.6884E−02 −8.0393E−03   2.3097E−03 −3.3540E−04   1.4132E−05  9.2020E−07 R5   4.1285E+00 −1.4995E−02   2.0745E−02 −2.7154E−02  2.3625E−02 −1.3676E−02   4.9248E−03 −1.0471E−03   1.2030E−04−5.7888E−06 R6 −9.9100E+01   3.5801E−02 −4.9657E−02   3.9441E−02−2.2640E−02   9.4637E−03 −2.7465E−03   5.1484E−04 −5.5072E−05  2.5158E−06 R7 −8.8960E+01   5.5068E−02 −6.3335E−02   4.6726E−02−2.6437E−02   1.0601E−02 −2.8192E−03   4.6150E−04 −4.0028E−05  1.2483E−06 R8 −7.7052E−01 −7.1368E−03   1.1776E−03 −7.8491E−04  2.3904E−04 −1.5293E−05   5.3075E−06 −3.2819E−06   6.4796E−07−4.3213E−08 R9 −6.4585E+01   1.5813E−03   8.6901E−04 −1.0532E−03  6.3911E−04 −2.4917E−04   5.5508E−05 −6.6845E−06   4.0448E−07−9.7303E−09 R10   2.7176E+01 −5.0921E−03   2.4360E−04   2.3002E−04−2.3957E−04   1.1225E−04 −2.8114E−05   3.4505E−06 −1.4800E−07−1.6964E−09 R11 −9.9000E+01   1.9849E−03 −2.0738E−03   1.0133E−03−4.4881E−04   1.3260E−04 −2.7438E−05   3.5918E−06 −2.6221E−07  8.0731E−09 R12 −9.8422E+01 −1.6304E−02   6.0073E−03 −1.7428E−03  4.0095E−04 −7.2842E−05   8.5041E−06 −5.6955E−07   1.9341E−08−2.3359E−10 R13 −5.3073E+00   1.5429E−02 −1.0443E−02   2.4186E−03−4.8481E−04   8.7199E−05 −1.2017E−05   1.0639E−06 −5.3249E−08  1.1615E−09 R14 −6.6690E−01   5.7729E−03 −9.5412E−03   2.1332E−03−2.7396E−04   2.1755E−05 −1.0589E−06   2.9165E−08 −3.6329E−10  6.5957E−13 R15   1.1164E+01 −4.2551E−02   8.3807E−03 −6.3831E−04−8.5514E−06   5.1186E−06 −3.9110E−07   1.4310E−08 −2.6341E−10  1.9540E−12 R16 −2.1624E+01 −2.3705E−02   3.7888E−03 −4.2435E−04  4.6626E−05 −4.8103E−06   3.2855E−07 −1.2809E−08   2.5923E−10−2.1187E−12

In Table 2, k is a conic coefficient, and A4, A6, A8, A10, A12, A14,A16, A18 and A20 are aspheric surface coefficients.

IH. Image Heighty=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A1 6x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (1)

In the present embodiment, an aspheric surface of each lens surface usesthe aspheric surfaces shown in the above condition (1). However, thepresent disclosure is not limited to the aspherical polynomials formshown in the condition (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 10 according toEmbodiment 1 of the present disclosure. P1R1 and P1R2 represent theobject side surface and the image side surface of the first lens L1,respectively, P2R1 and P2R2 represent the object side surface and theimage side surface of the second lens L2, respectively, P3R1 and P3R2represent the object side surface and the image side surface of thethird lens L3, respectively, P4R1 and P4R2 represent the object sidesurface and the image side surface of the fourth lens L4, respectively,P5R1 and P5R2 represent the object side surface and the image sidesurface of the fifth lens L5, respectively, P6R1 and P6R2 represent theobject side surface and the image side surface of the sixth lens L6,respectively, P7R1 and P7R2 represent the object side surface and theimage side surface of the seventh lens L7, respectively, and P8R1 andP8R2 represent the object side surface and the image side surface of theeighth lens L8, respectively. The data in the column named “inflexionpoint position” refers to vertical distances from inflexion pointsarranged on each lens surface to the optic axis of the camera opticallens 10. The data in the column named “arrest point position” refers tovertical distances from arrest points arranged on each lens surface tothe optic axis of the camera optical lens 10.

TABLE 3 Number of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 0 P1R2 2 0.9451.215 P2R1 1 0.805 P2R2 1 1.235 P3R1 0 P3R2 1 1.635 P4R1 3 0.315 0.8451.745 P4R2 0 P5R1 2 1.635 1.975 P5R2 0 P6R1 1 1.255 P6R2 2 0.675 3.035P7R1 2 1.235 3.205 P7R2 2 1.455 4.175 P8R1 1 3.435 P8R2 1 0.715

TABLE 4 Number of Arrest Arrest arrest points point position 1 pointposition 2 P1R1 0 P1R2 0 P2R1 1 1.365 P2R2 0 P3R1 0 P3R2 0 P4R1 2 0.6550.995 P4R2 0 P5R1 0 P5R2 0 P6R1 1 1.825 P6R2 1 1.505 P7R1 1 2.155 P7R2 12.765 P8R1 0 P8R2 1 1.455

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and435 nm after passing the camera optical lens 10 according toEmbodiment 1. FIG. 4 illustrates a field curvature and a distortion oflight with a wavelength of 546 nm after passing the camera optical lens10 according to Embodiment 1, in which a field curvature S is a fieldcurvature in a sagittal direction and T is a field curvature in atangential direction.

Table 13 below further lists various values of Embodiments 1, 2, and 3and values corresponding to parameters which are specified in the aboveconditions.

As shown in Table 13, Embodiment 1 satisfies respective conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 3.797 mm. The image height of 1.0H is 6.50 mm. The FOV (field ofview) is 80.00°. Thus, the camera optical lens can achieve ultra-thin,wide-angle lenses while having on-axis and off-axis aberrationssufficiently corrected, thereby leading to better opticalcharacteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0 = −0.580 R1 3.358 d1 = 0.512 nd1 1.5450 ν155.81 R2 4.355 d2 = 0.467 R3 8.125 d3 = 0.289 nd2 1.6701 ν2 19.39 R47.139 d4 = 0.091 R5 7.416 d5 = 0.814 nd3 1.5510 ν3 45.00 R6 −8.628 d6 =0.153 R7 19.881 d7 = 0.447 nd4 1.6701 ν4 19.39 R8 6.626 d8 = 1.025 R928.648 d9 = 0.344 nd5 1.6501 ν5 21.44 R10 22.919 d10 = 0.573 R11 12.535d11 = 0.565 nd6 1.5843 ν6 28.25 R12 4.376 d12 = 0.244 R13 2.218 d13 =0.774 nd7 1.5510 ν7 45.00 R14 5.963 d14 = 1.952 R15 −4.334 d15 = 0.550nd8 1.5450 ν8 55.81 R16 16.912 d16 = 0.375 R17 ∞ d17 = 0.210 ndg 1.5168νg 64.17 R18 ∞ d18 = 0.192

Table 6 shows aspheric surface data of respective lenses in the cameraoptical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 A18 A20 R1 −5.3454E−01   4.6189E−04 −4.5936E−04 −9.0261E−05  3.1403E−04 −2.8856E−04   1.3549E−04 −3.7138E−05   5.6209E−06−3.6254E−07 R2 −1.5964E−02 −2.2257E−03 −1.4276E−03 −4.2703E−05  9.9952E−04 −1.0646E−03   5.6151E−04 −1.6828E−04   2.7597E−05−1.9099E−06 R3   1.0163E+01 −1.6829E−02 −6.5646E−03   3.8233E−03−2.4204E−04 −7.7419E−04   4.4139E−04 −1.1370E−04   1.5129E−05−8.7065E−07 R4 −7.8648E+01   1.9217E−02 −3.6096E−02   2.6698E−02−1.1734E−02   3.1380E−03 −5.1193E−04   5.9011E−05 −6.4622E−06  4.5823E−07 R5   1.1605E+01   1.2122E−03 −1.3633E−02   6.9597E−03  1.1316E−03 −3.2016E−03   1.6727E−03 −4.3510E−04   5.9064E−05−3.3867E−06 R6   5.2093E+00 −3.3436E−03 −4.1406E−03   4.3591E−03−2.5053E−03   9.1686E−04 −2.3233E−04   4.0933E−05 −4.3676E−06  1.9756E−07 R7   2.9084E+01 −2.8602E−03 −3.8472E−03   4.3658E−03−2.2522E−03   6.1663E−04 −6.7903E−05 −5.1536E−06   1.9365E−06−1.3294E−07 R8   3.1056E+00 −7.1138E−04 −2.0281E−03   2.0330E−03−1.0062E−03   2.7046E−04 −3.3581E−05 −1.5023E−07   4.4964E−07−3.1888E−08 R9 −1.1151E+03   5.3363E−03 −1.4724E−02   7.4701E−03−2.5922E−03   6.3179E−04 −1.1295E−04   1.4404E−05 −1.1949E−06  4.7497E−08 R10 −1.3470E+02   9.7032E−03 −1.8611E−02   9.3397E−03−3.4086E−03   9.1631E−04 −1.7781E−04   2.3279E−05 −1.8259E−06  6.4456E−08 R11 −5.6231E+01   1.1484E−02 −3.7192E−03   8.6616E−04−2.0660E−04   3.8361E−05 −5.1100E−06   4.4758E−07 −2.2591E−08  4.8831E−10 R12 −3.1383E+01 −1.9633E−02   7.8760E−03 −1.9577E−03  3.1443E−04 −3.5101E−05   2.6093E−06 −1.1614E−07   2.4816E−09−1.1847E−11 R13 −6.1048E+00   6.4309E−03 −2.5220E−03   2.3866E−04−2.2966E−05   2.4621E−06 −2.0849E−07   1.0727E−08 −2.9182E−10  3.5050E−12 R14 −5.9734E−01   1.4097E−02 −5.3533E−03   7.6007E−04−7.4338E−05   5.3030E−06 −2.7253E−07   9.5021E−09 −1.9748E−10  1.8118E−12 R15 −7.1302E−01 −4.7587E−03   1.2967E−04   3.6682E−05−1.1523E−06 −1.2668E−07   1.1025E−08 −3.7145E−10   6.0802E−12−4.0108E−14 R16 −7.2948E+01 −5.4882E−03   1.1603E−04   1.4318E−05−2.7430E−06   2.6307E−07 −1.4103E−08   4.1917E−10 −6.4471E−12  4.0011E−14

Table 7 and Table 8 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 20 according toEmbodiment 2 of the present disclosure.

TABLE 7 Number of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 1 1.935 P1R2 1 1.925 P2R1 1 0.755 P2R2 10.835 P3R1 1 1.805 P3R2 0 P4R1 1 1.945 P4R2 1 2.165 P5R1 1 0.615 P5R2 20.725 2.505 P6R1 1 1.695 P6R2 1 0.815 P7R1 2 1.455 3.775 P7R2 1 1.705P8R1 1 2.905 P8R2 2 0.855 4.905

TABLE 8 Number of arrest points Arrest point position 1 P1R1 0 P1R2 0P2R1 1 1.355 P2R2 1 1.875 P3R1 0 P3R2 0 P4R1 0 P4R2 0 P5R1 1 0.965 P5R21 1.125 P6R1 1 2.445 P6R2 1 2.225 P7R1 1 2.535 P7R2 1 2.765 P8R1 0 P8R21 1.535

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and435 nm after passing the camera optical lens 20 according to Embodiment2. FIG. 8 illustrates a field curvature and a distortion of light with awavelength of 546 nm after passing the camera optical lens 20 accordingto Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies respective conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 3.997 mm. The image height of 1.0 H is 6.50 mm. The FOV (fieldof view) is 78.80°. Thus, the camera optical lens can achieveultra-thin, wide-angle lenses while having on-axis and off-axisaberrations sufficiently corrected, thereby leading to better opticalcharacteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 9 and Table 10 show design data of camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0 = −0.580 R1 3.492 d1 = 0.695 nd1 1.5450 ν155.81 R2 4.933 d2 = 0.350 R3 8.611 d3 = 0.289 nd2 1.6701 ν2 19.39 R46.619 d4 = 0.106 R5 6.575 d5 = 0.696 nd3 1.5661 ν3 37.71 R6 −9.250 d6 =0.032 R7 11.765 d7 = 0.415 nd4 1.6701 ν4 19.39 R8 4.754 d8 = 1.079 R917.850 d9 = 0.346 nd5 1.6153 ν5 25.94 R10 18.365 d10 = 0.626 R11 12.606d11 = 0.645 nd6 1.5661 ν6 37.71 R12 9.741 d12 = 0.376 R13 2.836 d13 =0.703 nd7 1.5450 ν7 55.81 R14 5.048 d14 = 1.809 R15 −4.832 d15 = 0.551nd8 1.5450 ν8 55.81 R16 18.647 d16 = 0.375 R17 ∞ d17 = 0.210 ndg 1.5168νg 64.17 R18 ∞ d18 = 0.219

Table 10 shows aspheric surface data of respective lenses in the cameraoptical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspherical surface coefficients k A4 A6 A8A10 A12 A14 A16 A18 A20 R1 −1.0415E+00   2.1158E−03 −5.5031E−04  6.5406E−04 −6.7028E−04   4.0388E−04 −1.4797E−04   3.1941E−05−3.6985E−06   1.7614E−07 R2 −6.7246E−01 −1.9455E−03 −3.3163E−05−1.7343E−03   1.4664E−03 −7.1319E−04   2.0828E−04 −3.3852E−05  2.7913E−06 −9.0814E−08 R3   3.5342E+00 −1.6572E−02   5.0875E−03−1.4093E−02   1.5168E−02 −9.3422E−03   3.5972E−03 −8.4616E−04  1.1065E−04 −6.1502E−06 R4 −5.3633E+01   8.6638E−03 −3.2494E−03−1.3382E−02   1.5755E−02 −9.1911E−03   3.3140E−03 −7.4071E−04  9.3221E−05 −5.0110E−06 R5   6.2458E+00 −2.2228E−03   7.9345E−03−1.3313E−02   9.4553E−03 −3.9694E−03   1.0165E−03 −1.4874E−04  9.8053E−06 −6.5796E−08 R6 −3.2098E+01   1.8748E−02 −2.3577E−02  1.5395E−02 −7.0174E−03   2.1035E−03 −3.9051E−04   4.4806E−05−3.8012E−06   2.3781E−07 R7 −3.0427E+01   1.4817E−02 −1.9935E−02  1.2108E−02 −5.0589E−03   1.4591E−03 −2.5989E−04   2.4113E−05−7.3607E−07 −1.7671E−08 R8   6.0047E−01 −8.3927E−03   2.4168E−03−1.7567E−03   9.4805E−04 −2.9143E−04   5.5498E−05 −6.6436E−06  4.6028E−07 −1.3964E−08 R9 −4.9950E+02   4.9883E−03 −1.0885E−02  5.2439E−03 −1.8719E−03   5.0666E−04 −1.0338E−04   1.4566E−05−1.2176E−06   4.4479E−08 R10 −2.4884E+02   2.8761E−03 −8.0788E−03  2.4053E−03 −3.8590E−04   1.8710E−05   3.5814E−06 −5.9293E−07  3.2529E−08 −6.2145E−10 R11 −1.4576E+01   7.3229E−03 −1.1453E−03−5.5815E−04   2.5975E−04 −5.6733E−05   7.0685E−06 −5.0230E−07  1.8833E−08 −2.8782E−10 R12 −4.3318E+01 −1.2175E−02   5.4137E−03−1.7101E−03   3.4382E−04 −4.7559E−05   4.3557E−06 −2.4581E−07  7.6217E−09 −9.8363E−11 R13 −6.8605E+00   1.5227E−02 −6.3470E−03  1.2505E−03 −2.2011E−04   2.7830E−05 −2.1815E−06   1.0035E−07−2.4860E−09   2.5625E−11 R14 −1.0583E+00   1.1760E−02 −4.4116E−03  4.5787E−04 −2.2028E−05   1.8441E−07   3.7223E−08 −2.2336E−09  5.7630E−11 −5.8979E−13 R15 −1.2024E+00   2.9886E−03 −3.1705E−03  7.7151E−04 −8.7236E−05   5.4900E−06 −2.0279E−07   4.3562E−09−5.0265E−11   2.4048E−13 R16   6.5252E+00   4.3285E−05 −1.7235E−03  2.6835E−04 −2.0412E−05   8.9017E−07 −2.3135E−08   3.5263E−10−2.9012E−12   9.9251E−15

Table 11 and Table 12 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 30 according toEmbodiment 3 of the present disclosure.

TABLE 11 Number of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 0 P1R2 0 P2R1 10.765 P2R2 1 0.905 P3R1 1 1.685 P3R2 0 P4R1 1 1.085 P4R2 0 P5R1 1 0.715P5R2 1 0.735 P6R1 1 1.605 P6R2 1 1.075 P7R1 2 1.485 3.785 P7R2 2 1.6854.475 P8R1 2 3.955 4.585 P8R2 3 1.125 4.855 5.455

TABLE 12 Number of arrest points Arrest point position 1 P1R1 0 P1R2 0P2R1 1 1.325 P2R2 1 1.825 P3R1 0 P3R2 0 P4R1 0 P4R2 0 P5R1 1 1.165 P5R21 1.175 P6R1 1 2.345 P6R2 1 2.005 P7R1 1 2.475 P7R2 1 2.845 P8R1 0 P8R21 1.825

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and435 nm after passing the camera optical lens 30 according to Embodiment3. FIG. 12 illustrates field curvature and distortion of light with awavelength of 546 nm after passing the camera optical lens 30 accordingto Embodiment 3.

Table 13 below further lists various values of the present embodimentand values corresponding to parameters which are specified in the aboveconditions. Obviously, the camera optical lens according to thisembodiment satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 3.987 mm. The image height of 1.0H is 6.50 mm. The FOV (field ofview) is 78.80°. Thus, the camera optical lens can achieve ultra-thin,wide-angle lenses while having on-axis and off-axis aberrationssufficiently corrected, thereby leading to better opticalcharacteristics.

TABLE 13 Parameters and Conditions Embodiment 1 Embodiment 2 Embodiment3 f1/f 1.90 2.91 2.40 f2 −14.70 −98.41 −44.82 n3 1.67 1.55 1.57 f 7.4047.794 7.775 f1 7.404 7.794 7.775 f3 4.843 7.333 6.856 f4 −5.394 −14.856−12.051 f5 10.305 −178.612 815.428 f6 −26.867 −11.708 −81.933 f7 12.2375.940 10.625 f8 −6.670 −6.246 −6.954 f12 107.31 28.242 29.227 Fno 1.951.95 1.95

Fno denotes an F number of the camera optical lens.

It can be appreciated by one having ordinary skill in the art that thedescription above is only embodiments of the present disclosure. Inpractice, one having ordinary skill in the art can make variousmodifications to these embodiments in forms and details withoutdeparting from the spirit and scope of the present disclosure.

What is claimed is:
 1. A camera optical lens, comprising, from an objectside to an image side: a first lens; a second lens; a third lens; afourth lens; a fifth lens; a sixth lens; a seventh lens; and an eighthlens, wherein the camera optical lens satisfies following conditions:1.90≤f1/f≤3.00; f2≤0.00; and 1.55≤n3≤1.70, 5.00≤d5/d6≤22.00, where fdenotes a focal length of the camera optical lens; f1 denotes a focallength of the first lens; f2 denotes a focal length of the second lens;and n3 denotes a refractive index of the third lens; d5 denotes anon-axis thickness of the third lens; and d6 denotes an on-axis distancefrom an image side surface of the third lens to an object side surfaceof the fourth lens.
 2. The camera optical lens as described in claim 1,further satisfying a following condition:−7.00≤(R13+R14)/(R13−R14)≤−2.00, where R13 denotes a curvature radius ofan object side surface of the seventh lens; and R14 denotes a curvatureradius of an image side surface of the seventh lens.
 3. The cameraoptical lens as described in claim 1, further satisfying followingconditions: −15.47≤(R1+R2)/(R1-R2)≤−2.06; and 0.03≤d1/TTL≤0.11, where R1denotes a curvature radius of an object side surface of the first lens;R2 denotes a curvature radius of an image side surface of the firstlens; d1 denotes an on-axis thickness of the first lens; and TTL denotesa total optical length from the object side surface of the first lens toan image plane of the camera optical lens along an optic axis.
 4. Thecamera optical lens as described in claim 1, further satisfyingfollowing conditions: −25.25≤f2/f≤−1.32; 1.37≤(R3+R4)/(R3−R4)≤23.22; and0.02≤d3/TTL≤0.05, where R3 denotes a curvature radius of an object sidesurface of the second lens; R4 denotes a curvature radius of an imageside surface of the second lens; d3 denotes an on-axis thickness of thesecond lens; and TTL denotes a total optical length from an object sidesurface of the first lens to an image plane of the camera optical lensalong an optic axis.
 5. The camera optical lens as described in claim 1,further satisfying following conditions: 0.33≤f3/f≤1.41;−0.53≤(R5+R6)/(R5−R6)≤−0.05; and 0.03≤d5/TTL≤0.13, where f3 denotes afocal length of the third lens; R5 denotes a curvature radius of anobject side surface of the third lens; R6 denotes a curvature radius ofan image side surface of the third lens; d5 denotes an on-axis thicknessof the third lens; and TTL denotes a total optical length from an objectside surface of the first lens to an image plane of the camera opticallens along an optic axis.
 6. The camera optical lens as described inclaim 1, further satisfying following conditions: −3.81≤f4/f≤−0.49;0.32≤(R7+R8)/(R7−R8)≤3.53; and 0.02≤d7/TTL≤0.07, where f4 denotes afocal length of the fourth lens; R7 denotes a curvature radius of anobject side surface of the fourth lens; R8 denotes a curvature radius ofan image side surface of the fourth lens; d7 denotes an on-axisthickness of the fourth lens; and TTL denotes a total optical lengthfrom an object side surface of the first lens to an image plane of thecamera optical lens along an optic axis.
 7. The camera optical lens asdescribed in claim 1, further satisfying following conditions:−45.83≤f5/f≤157.32; −140.64≤(R9+R10)/(R9−R10)≤13.50; and0.02≤d9/TTL≤0.13, where f5 denotes a focal length of the fifth lens; R9denotes a curvature radius of an object side surface of the fifth lens;R10 denotes a curvature radius of an image side surface of the fifthlens; d9 denotes an on-axis thickness of the fifth lens; and TTL denotesa total optical length from an object side surface of the first lens toan image plane of the camera optical lens along an optic axis.
 8. Thecamera optical lens as described in claim 1, further satisfyingfollowing conditions: −21.08≤f6/f≤−1.00; and1.04≤(R11+R12)/(R11−R12)≤11.70; and 0.03≤d11/TTL≤0.10, where f6 denotesa focal length of the sixth lens; R11 denotes a curvature radius of anobject side surface of the sixth lens; R12 denotes a curvature radius ofan image side surface of the sixth lens; d11 denotes an on-axisthickness of the sixth lens; and TTL denotes a total optical length froman object side surface of the first lens to an image plane of the cameraoptical lens along an optic axis.
 9. The camera optical lens asdescribed in claim 1, further satisfying following conditions:0.38≤f7/f≤2.48; and 0.03≤d13/TTL≤0.12, where f7 denotes a focal lengthof the seventh lens; d13 denotes an on-axis thickness of the seventhlens; and TTL denotes a total optical length from an object side surfaceof the first lens to an image plane of the camera optical lens along anoptic axis.